Human chorionic gonadotropin (hCG) is the primary hormone present when a woman is pregnant.
Understanding hCG
hCG, also known as the "pregnancy hormone," is a hormone produced almost exclusively by the placenta after implantation of a fertilized egg. Its presence in the blood or urine is the basis for most pregnancy tests.
- Unique Role: hCG plays a crucial role in supporting the pregnancy by maintaining the corpus luteum, which produces progesterone essential for sustaining the pregnancy in its early stages. [Source: My.ClevelandClinic.org]
- Detection: hCG levels increase rapidly during early pregnancy, making it detectable through blood or urine tests. These tests can be qualitative (detecting the presence of hCG) or quantitative (measuring the amount of hCG present). [Source: MedlinePlus]
- Placental Production: The placenta is the primary source of hCG production throughout pregnancy. [Source: Johns Hopkins Medicine]
Other Hormones During Pregnancy
While hCG is the defining hormone of pregnancy, several others also experience significant changes during gestation. These include estrogen and progesterone, which contribute to the numerous physiological changes a woman experiences. [Source: Healthline] However, it's crucial to remember that hCG is unique to pregnancy. [Source: My.ClevelandClinic.org]
Although other hormones fluctuate during pregnancy, hCG is uniquely associated with and essential for a successful pregnancy.
